I got a Non-System Disk or Disk Error when I booted up my 2 year old Compaq notebook. After restarting about 50 times over the span of half an hour, Windows ...

Unfortunately, you have probably deleted your IO.SYS file. If you had deleted COMMAND.COM, you'd get a "bad or missing command interpreter" messge. Your system would boot without AUTOEXEC.BAT or ...